One of the most amazing friends you will ever have. But dont expect to talk to them late at night, they like to go to bed around ten or so. Most of the time if you are talking to them they fall asleep. Even though they fall asleep a lot they are simply amazing. If you are lucky enough to have a sleepy head in your life, dont lose them. They are loyal, a great listener, and will do whatever it takes have to to make you happy.

This is when you're desperately needing some head, but your girl's asleep. Therefore, you sneak into the room and stick your dick in her mouth while she's sleeping. By instinct, she'll probaby start sucking your dick while sleeping, giving this action the name "Sleepy Head"

Friend 1- Man, the other night my girl was asleep and I really needed some head.
Friend 2- I guess that left you to use your right hand for the night,
Friend 1- Nah man. I just stuck it in her mouth and she gave me some sleepy head.